There is a whole bunch of legal stuff that can help in opiate wd's. First loperamide (Imodium) can help a great deal for the phsyical symptoms. It is, in fact, an opioid, but one which does not significantly cross the blood-brain barrier, and so it has no psychoactive effects. Diphenhydramine (Benadryl) can also be helpful in treating the nausea, as well as helping with some of the anxiety and sleeplessness. Valerian root can be very helpful, I think, in producing sedation. It is GABAergic, working on GABA as benzos, barbs, or alcohol do. So, it is good with anxiety and sleeplessness, too. Sometimes NSAID's like ibuprofen or naproxen can help with body aches, however they can be tough on the stomach esp. if you are not eating and nauseated as one would usually be in opiate wd's. So, you could try a low dose, and work your way up as comfortable if they do help. Taking a Tums or a simple antacid a little before a dose of an NSAID could help for the stomach issues.
You will want to take a lot of hot baths/showers, or simply soak your feet in hot water. This can help, at least temporarily, with chills, sweats etc. Some people enjoy exercise claiming the natural endorphins released help, however, exercising during opiate wd might not be the first thing you want to do. Other than that, trying to distract onself can be helpful, to a degree - to take your mind off of the opiate wd's. I hope it goes as best it can.